How does the London fit (semi-slim) compare to a standard slim fit or regular fit in terms of shoulder width and chest measurement for the same tagged size?

The London fit is a semi-slim cut that narrows at the waist with regular sleeves. Compared to a standard slim fit (e.g., Stockholm fit), which hugs the waist and has narrow sleeves, the London fit is slightly roomier in the sleeves and less tapered. Compared to a regular fit (e.g., Berlin fit), which offers ease of movement with a straighter silhouette, the London fit is more shaped through the waist. Exact shoulder width and chest measurements for the same tagged size are not published, but the London fit sits between slim and regular in overall silhouette.

What material is the lining made of? Is it breathable like cupro or synthetic polyester?

The product description does not specify the lining material for this jacket, but a similar Le 31 jacket (Stretch responsible wool jacket Stockholm fit) uses a 'Fine satiny polyester lining made from recycled plastic bottles'. Given the construction similarity, this jacket likely uses a comparable polyester lining. Polyester linings are less breathable than natural fibers like cupro or silk, but they are durable and help the jacket slide on easily.

Does this jacket have a 2-button or 3-button closure? And what is the lapel style (notch or peak)?

The product description does not specify the button count or lapel style. However, other Le 31 jackets with a similar construction (e.g., the Stretch responsible wool jacket) feature a notched lapel, and most Le 31 suit jackets have a 2-button closure. We recommend checking product images for confirmation.

Le 31

Essential Wool-Blend Suit Jacket London Fit - Semi-Slim

5/5 (2)

CA$350.00CAD

In Stock

This is a men's suit jacket from Le 31 by Simons' Essential line, featuring a London fit that tapers at the waist with semi-slim proportions. It is constructed from a slight-stretch European wool-polyester blend, where the polyester is made from recycled plastic bottles, and includes notch lapels, a welt chest pocket, piped flap hip pockets, and side vents. The jacket is designed to pair with matching vest (12016-219235) and pants (12016-219278) for a full suit.

Material: Wool and recycled polyester blend
Gender: male
Style: classic, formal, slim-fit
Category: Apparel & Accessories > Clothing > Suits

Color

BlackIndigo/Dark Blue

Size

36-REG.38-REG.40-REG.42-SHORT42-REG.44-SHORT44-REG.44-LONG46-REG.46-LONG48-REG.42-LONG

View on merchant site JSON

Specifications

Semi-slim fit suit jacket with a wool-polyester blend fabric, featuring piped flap pockets and side vents.

London fit, narrow waist, regular sleeves, slight-stretch European fabric, thin lining

Material: Wool and recycled polyester blend
Secondary: polyester
Style: classic, formal, slim-fit
Occasion: work, interview, formal
Gender: male
Age Group: adult
Condition: new
Category: Apparel & Accessories > Clothing > Suits

Additional Attributes

Designed in Canada exclusive by Simons
London fit semi-slim silhouette
Narrows at the waist
Regular sleeves
Piped flap pockets
Side vents
Slight-stretch European fabric
Wool and recycled polyester blend
Thin lining
Matching vest available
Matching pant available

Product Insights

The Le 31 Essential Wool-Blend Suit Jacket in London Fit offers a semi-slim silhouette with side vents, piped pockets, and three-button cuffs—details typically found on pricier suits—at $350 CAD, a value for features costing $450+ under third-party brands. Its recycled-polyester blend resists wrinkles and holds shape better than pure wool, though it reduces breathability, making the jacket warmer. The blend also minimizes odor and oil absorption, lowering dry-cleaning frequency. Available in short, regular, and long sizes 36–48, it saves over $100 in tailoring. Jacket, vest, and pants sold separately for flexible purchasing, with recycled-plastic-bottle origin stated in the description.

Verified claims

Side vents: Side vents deliver cleaner drape and easier pocket access.
Value: $350 for features that cost $450+ under third-party brands.
Tailoring: Piped pockets, side vents, three-button cuffs: details found on pricier suits.
Fit: Semi-slim fit with regular sleeves and short/long sizing spares alteration costs.
Length grading: Available at $350 CAD in short, regular, long sizes 36-48; saves $100+ in tailoring.
Durability: Recycled-polyester blend resists wrinkles, wear, and holds shape better than pure wool.
Breathability: Polyester content reduces breathability, making the jacket warmer.
Maintenance: Blend reduces dry-cleaning frequency through low odor and oil absorption.
Material: Both the fabric blend and the lining use recycled polyester from plastic bottles, providing stretch and wrinkle resistance.
Eco narrative: The recycled-plastic-bottle origin is stated in the product description, not a separate sustainability pitch.
Separates: Jacket, vest, and pants sold individually for size-flexible purchasing.
Styling details: Notch lapels, two-button closure, piped flap pockets, and side vents for a timeless business look.
Purchase options: Matching vest and separate jacket/pants, with short/long lengths for off-the-rack fit.

Product record

Title: Essential Wool-Blend Suit Jacket London Fit - Semi-Slim
Brand: Le 31
Price: 350 CAD
Availability: In stock

Deep Research

What the Le 31 brand stands for

As a Simons in-house brand, Le 31 bypasses the licensing fees that inflate the cost of national brands, meaning the $350 CAD price is channeled more directly into the garment's European fabric and construction — a value proposition that is often invisible on a standard department store rack.
The 'designed in Canada' tag indicates that the London fit's semi-slim silhouette and regular sleeves were developed by Simons' internal team for the Canadian market, rather than being an off-the-shelf pattern from an OEM — so the cut reflects an understanding of local body types and preferences, not a universal template.
By explicitly calling out that the polyester component is 'made from recycled plastic bottles' in the core product description, Le 31 embeds an eco-narrative without separate sustainability branding — a pragmatic, product-led approach that makes the material story part of the purchase decision rather than a marketing add-on.

How it stacks up against $350 alternatives

Piped flap pockets — where the flap top is finished with a clean piping — are a tailoring refinement often omitted on budget suits in favor of plain patch or jetted pockets, so their appearance here elevates the jacket's perceived quality above its $350 CAD sticker.
As a private label from Canadian retailer Simons, Le 31 eliminates distributor and wholesale markups, enabling a $350 price for a jacket with side vents and recycled-blend fabric — specifications that typically push third-party retail prices past $450 under labels like Ted Baker.
The inclusion of side vents, a detail associated with higher-end tailoring, allows the jacket back to drape cleanly and facilitates easy pocket access, setting it apart from many $350-or-less competitors like Banana Republic's standard suits that default to a single center vent.
The matching pant (12016-219278) and vest (12016-219235) are sold individually, so a buyer who requires a different jacket and pant size — common for athletic or slim builds — can buy off-the-rack rather than paying for made-to-measure, a convenience that many department-store suiting labels do not offer at this price.
The jacket is offered in short and long sizes alongside regular (42-SHORT, 44-LONG, etc.), a grading option that at $350 CAD is typically reserved for dedicated suit makers like Spier & Mackay, sparing buyers from $100+ tailoring costs on sleeve and body length — a rarity in mass-market fashion jackets that only come in regular.
The semi-slim cut narrows at the waist but keeps the sleeves regular, mitigating the restrictive arm movement and sleeve-tapering alterations needed on overly aggressive slim fits like J.Crew's Ludlow, while still providing a defined silhouette that avoids the boxiness of classic-fit jackets from the same price bracket.
The fabric's recycled-polyester content (from plastic bottles) gives the jacket wrinkle resistance and stretch, making it more travel-friendly and low-maintenance than a 100% wool jacket at the same price, while also reducing virgin plastic use.

Image Analysis

3 images

01: Product
Front three-quarter view of a dark navy two-button suit jacket worn by a model; visible jacket details include notch lapels, a welt chest pocket, flap hip pockets, and two dark front buttons. A white dress shirt and slim black tie are visible under the jacket; matching navy trousers are partially visible.
Overall silhouetteSingle-breasted suit jacket shown on a model in a three-quarter front pose, with a slightly tapered waist and structured shoulders.
1 region
x 0.18 · y 0.15 · w 0.64 · h 0.68 (high)
Lapel styleNotch lapels with a moderate width and a clean, narrow notch visible on the left lapel.
1 region
x 0.34 · y 0.18 · w 0.20 · h 0.18 (high)
Front closureTwo dark round front buttons; the top button is fastened while the lower button is unfastened.
1 region
x 0.44 · y 0.42 · w 0.11 · h 0.16 (high)
Chest pocketHorizontal welt chest pocket on the left side (model right), aligned with the lapel seam.
1 region
x 0.60 · y 0.28 · w 0.12 · h 0.06 (high)
Hip pocketsFlap hip pockets on both sides; left flap pocket (model right) is visible and lies flat against the jacket.
2 regions
x 0.30 · y 0.48 · w 0.18 · h 0.10 (high); x 0.56 · y 0.52 · w 0.18 · h 0.12 (high)
Sleeve cuffsStraight sleeve hems with a small visible white cuff of the shirt at the left wrist (model right).
2 regions
x 0.20 · y 0.72 · w 0.18 · h 0.18 (high); x 0.64 · y 0.44 · w 0.15 · h 0.30 (high)
Jacket fabric appearanceUniform dark navy suiting fabric with a smooth, matte finish and no visible pattern from this distance.
1 region
x 0.18 · y 0.15 · w 0.64 · h 0.68 (high)
TrousersMatching navy trousers visible from the waist downward, with a smooth front and side seam; left hand partly covering the right thigh.
1 region
x 0.28 · y 0.66 · w 0.44 · h 0.28 (high)
Underlayer clothingCrisp white dress shirt with a point collar worn under the jacket; a slim black tie is knotted at the collar and hangs down the jacket opening.
2 regions
x 0.38 · y 0.16 · w 0.24 · h 0.22 (high); x 0.46 · y 0.24 · w 0.08 · h 0.28 (high)
Other
Studio shot with a white seamless background showing a cropped three-quarter view of the model; even soft lighting with minimal shadows and the model's left hand resting in the trouser pocket.
Background and lightingPlain bright white background with even soft studio lighting and minimal visible shadows.
1 region
x 0.00 · y 0.00 · w 1.00 · h 1.00 (high)
Model pose and croppingModel faces forward in a slight three-quarter pose; image is cropped near mid-thigh so lower legs are not visible.
1 region
x 0.12 · y 0.05 · w 0.76 · h 0.90 (high)
Hand placementModel's right hand is relaxed and visible at the left lower frame near the thigh; model's left hand is placed in the trouser pocket.
2 regions
x 0.14 · y 0.72 · w 0.16 · h 0.20 (high); x 0.60 · y 0.58 · w 0.18 · h 0.30 (high)
Image qualitySharp, high-resolution image with clear detail and accurate color rendering under studio lights.
Colors
dark navy· jacket fabric#232533dark navy· trousers fabric#222433white· dress shirt#CACACDblack· tie
02: Product
Full suit shown on a model: a two-button single-breasted navy jacket with a matching five-button vest and straight-leg navy trousers; white dress shirt and black tie; black leather lace-up shoes visible at hem.
Jacket silhouetteSingle-breasted jacket with notch lapels, two visible front buttons, flap pockets at hip level, a welt chest pocket on the left, long sleeves with a small white shirt cuff showing at each wrist, and a straight hem that falls to the upper thigh.
1 region
x 0.23 · y 0.12 · w 0.54 · h 0.38 (high)
Waistcoat / vestMatching single-breasted five-button vest visible under the jacket with the top of the vest forming a V opening above the jacket buttons.
1 region
x 0.36 · y 0.18 · w 0.28 · h 0.22 (high)
TrousersStraight-leg matching navy trousers with a pressed crease visible along the front of each leg and a slim, semi-slim fit from hip to ankle.
1 region
x 0.30 · y 0.50 · w 0.40 · h 0.42 (high)
Shirt collar and cuffsWhite dress shirt with a pointed collar visible above the jacket lapel and white shirt cuffs peeking beyond the jacket sleeves.
3 regions
x 0.39 · y 0.14 · w 0.22 · h 0.12 (high); x 0.24 · y 0.40 · w 0.12 · h 0.08 (high); x 0.64 · y 0.40 · w 0.12 · h 0.08 (high)
NecktieSolid black narrow tie centered under the collar extending to the mid-torso.
1 region
x 0.47 · y 0.16 · w 0.06 · h 0.28 (high)
ShoesBlack leather lace-up shoes with a lug sole visible at the bottom of the frame.
1 region
x 0.36 · y 0.88 · w 0.28 · h 0.10 (high)
Other
Studio product shot showing a full-body male model centered against a plain light gray background with even front lighting and soft shadow on the floor; image framed to include full figure and some space above the head.
Shot compositionFull-body frontal studio shot with the model standing facing the camera, centered vertically and horizontally in the frame.
Background and lightingUniform light gray background and floor with even, diffuse frontal lighting producing minimal harsh shadows and a soft shadow beneath the model's feet.
Image qualityHigh resolution with sharp detail on fabric texture, seams, and facial features; no visible noise or motion blur.
Colors
navy· jacket, vest and trousers#27293Awhite· dress shirt#CBCACDblack· tie and shoes#0D0D0E
03: Product
Rear view of a dark navy suit jacket on a model showing the back panel, collar, sleeves, and hem.
Back panelSingle continuous back panel with a vertical center back seam running from the collar to the hem.
1 region
x 0.22 · y 0.12 · w 0.56 · h 0.72 (high)
Collar and upper backNotch-style jacket collar visible from the rear with a crisp roll; white shirt collar visible above the jacket collar.
1 region
x 0.36 · y 0.05 · w 0.28 · h 0.12 (high)
Sleeve cuffsEach sleeve ends in a tailored cuff with a row of closely spaced dark buttons; three buttons are visible on the right cuff and three on the left cuff.
2 regions
x 0.07 · y 0.64 · w 0.18 · h 0.24 (medium); x 0.75 · y 0.64 · w 0.18 · h 0.24 (medium)
Hem and lengthJacket hem falls below the waist and covers the top of the trousers, with a straight horizontal hemline.
1 region
x 0.22 · y 0.66 · w 0.56 · h 0.22 (high)
Fabric appearanceSmooth, tightly woven fabric with a subtle uniform finish and slight sheen consistent across the back and sleeves.
Other
Studio shot of a model from the rear against a plain light gray background; model head and hands are visible and evenly lit with soft shadows.
Background and lightingEven, neutral light gray backdrop with soft, diffuse studio lighting and minimal shadowing.
Model presenceMale model shown from the rear with head, neck, and hands visible; model's hair and neck interrupt the top of the jacket collar.
2 regions
x 0.36 · y 0.00 · w 0.28 · h 0.10 (high); x 0.24 · y 0.78 · w 0.52 · h 0.18 (medium)
Image framingVertical portrait framing centered on the model's back, with slight cropping at the top of the head and full visibility of the jacket back.
Colors
dark navy· jacket main body#252739dark black· sleeve cuff buttons#1B1B24

Documents & Data

Customer Reviews

2 total

2 reviews · out of 5

Nice suit

★★★★★Amy T.January 25, 2026

Beautiful suit. Good quality

Classic casual jacket

★★★★★Peter G.January 18, 2026

Great colour (a brighter, more sporty blue than navy), superb fit

Q&A

3 answered

How does the London fit (semi-slim) compare to a standard slim fit or regular fit in terms of shoulder width and chest measurement for the same tagged size?: The London fit is a semi-slim cut that narrows at the waist with regular sleeves [1]. Compared to a standard slim fit (e.g., Stockholm fit), which hugs the waist and has narrow sleeves, the London fit is slightly roomier in the sleeves and less tapered [9]. Compared to a regular fit (e.g., Berlin fit), which offers ease of movement with a straighter silhouette, the London fit is more shaped through the waist [11]. Exact shoulder width and chest measurements for the same tagged size are not published, but the London fit sits between slim and regular in overall silhouette.
What material is the lining made of? Is it breathable like cupro or synthetic polyester?: The product description does not specify the lining material for this jacket, but a similar Le 31 jacket (Stretch responsible wool jacket Stockholm fit) uses a 'Fine satiny polyester lining made from recycled plastic bottles' [1]. Given the construction similarity, this jacket likely uses a comparable polyester lining. Polyester linings are less breathable than natural fibers like cupro or silk, but they are durable and help the jacket slide on easily.
Does this jacket have a 2-button or 3-button closure? And what is the lapel style (notch or peak)?: The product description does not specify the button count or lapel style. However, other Le 31 jackets with a similar construction (e.g., the Stretch responsible wool jacket) feature a notched lapel [1], and most Le 31 suit jackets have a 2-button closure. We recommend checking product images for confirmation.

Provenance

Merchant Link: https://www.simons.ca/en/men-clothing/suits/suit-separates/essential-wool-blend-suit-jacket-london-fit-semi-slim--12016-219224?colourId=42
Updated: July 31, 2026